Color

#173d97

#173d97
hex#173d97
rgbrgb(23, 61, 151)
hslhsl(222, 74%, 34%)
oklchoklch(0.394 0.154 263.5)
Closest name: Depths of Night (#2c319b)Relative luminance 0.0575

Colors that go with #173d97

Charcoal, Sea Green and Steel Blue lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#977017

#177d97 · #301797

#97173d · #3d9717

Split-complementary

Open in tool →

#973017 · #7d9717

#97177d · #977017 · #179730

Contrast

#173d97 as textRatioAAAA largeAAAFix
Aaon white
9.76:1passpasspassPasses AAA — no fix needed.
Aaon black
2.15:1failfailfail
  • AA: use #3c6ee2 as the text (4.52:1)
  • AAA: use #7195ea as the text (7.19:1)
  • AA: or shift the background to #b0b0b0 (4.5:1)
  • AAA: or shift the background to #dbdbdb (7.05:1)

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #173d97 as the background.

Brands using this color

Palettes built around it

Fonts for this mood

#173d97 reads as cool, vivid, technical. The font library is tagged with the same vocabulary:

mcpConnect your agent — build around #173d97
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #173d97 and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/173d97-9ca3c4-df6e4e-211f2d-e9eff1?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md